Concrete interlocking piling



- NOIV.*16, 1937. E F STEVENS 2,099,543

CONCRETE INTERLOCK ING PIL ING Filed Jan. y31, 1956 v r In/yeW/o' v h/lsAorw/eys v'ao Patented Nov. 146', 1937 UNITED STATES PATENT oFFicE 1 ooNcnErE mrannocma rmme Edwin Fenton Stevens, St. Paul, Application January 31, 193s, 'serai No. 61,713

Another object is to provide such pile units suited for use in forming corners or angles in walls built of my pile units.

'Ihese and other objects and advantagesof the invention will be more fully set forth in the foilowing description made in connectionwlth the accompanying drawing, in which like reference characters refer to similar parts throughout the several views, and in which:

Fig. 1 is a horizontal sectional View cfa portion of a wall built ofl one form of my pile units;

Fig. 2 is a vertical` View of a portion of the bottom end part of a wall built of my' pile units;

Fig. 3 is a horizontal sectional lview of a second form of my pile unit;

Fig. 4 is a horizontal sectional view of a thir form of my pile unit;

Fig. 5 is a horizontal sectional view oi a corner portion of a Wallbuilt of `a fourth form of my piling; i

Fig. 6 is a view looking toward the inner side oi one of the interlocking elements; y

Fig. 7 is a plan view looking down on a second form of interlocking element;

Fig. 8 is a view looking toward the inner side of i the interlocking element shown in Fig. 7; and

Fig. 9 is a plan view of still another type of interlocking element.

Referring to the drawing and particularly te Fig. l, a pile unit for use in straight wall construction consists of an elongated member 6 cast in suitable material, such as concrete and having a rectangular cross sectional shape. One of the narrow sides of the member t is provided throughout its length with a longitudinally ex- `tending recess or groove 6a which may be of rectangular cross-sectional shape, as shown. 1 Interlocking means is provided for locking a pair of members 6 to each other in parallel relaright angle.

tion. For this purpose interlocking elements l are secured to-the member 6 by suitable means. Each interlocking element 'l vis similar to the interlocking elements used on steel sheet piling except that anchoring means suitable for anchoring' to concrete is formed integrally` therewith and comprises a series of fingers o r prongsg projecting rearwardly from the interlocking element l. Some of the anchoringprongs 'I are bent to-one side and some to the other lside as Y shown, it being'preferable that alternate prongs be bent in the same direction. The interlocking elements 'l are so positioned when the member d is cast that material from which the member t is cast will surround the prongs 'la to anchor the interlocking elements l to the member d. An

Interlocking element 'l is disposed in the recess da of the member t and a second interlocking element 'l is disposed immediately outwardly of the side opposite the recessed side of the member t,

both of these interlocking elements extending through substantially the entire length of the member t.

The proportions and arrangement of the mem ber 6 and the interlocking elements 'l carried thereby are such that, when two such members d are connected together by the interlocking ele ments thereof, the' facing sides of the respective members 6 will abuteach other closely but with sumcient clearance to permit longitudinal slid-v ing movement oi one of the two members t relative to the other.

If desired each pile member or unit t may be provided with an vaxially located longitudinally extending aperture or hollow t by means of which lifting or handling devices or other elements may be connected or anchored to the member d. The

lower end of the member t may be provided with bevels 6b, if desired, to facilitate driving of the be selected so as to produce any desired angle in a wall.

The left hand side of the pile unit 9 and the recess 9a and interlocking element 1 thereof are identical with corresponding portions of the first described pile units. The right hand face' or side 9b of the pile member 9 is disposed at an.l angle to the wider faces or sides other than a Another pue unit lo is identical with the lfirst -describedV pile unit 6 with the exception that the left hand side or face of the same is disposed at an angle relative to the wider sides or faces other than a right angle as shdwn.

In building a wall of my pile units 6, 0 and I0,

the same are driven or ietted, one or more at a time inthe same manner as ordinary steel sheet piling is driven.

A second form of my piling shown in Fig. 3 is identical lwith. the pile unit 6 of Fig. 1 in all respects except that the pile member il thereof is of square cross sectional shape instead of having sides of unequal width.

A third form, of my piling shown in Fig. 4 is the same as the pile unit 6 of Fig. l except that the pile member l2 thereof is of polygonal cross sectional shape having more than four sides instead of rectangular cross sectionalsliape. While an octagonalI cross-sectional shape is shown it should be obvious that a. hexagonal or yother polygonal cross-sectional shape may be used as desired. For piles to be used in straight walls polygonal shapes having even numbers of faces should be used. For piles to be used at angles in walls, the particular polygonal shape and the particular faces of the polygon in which the interlocking elements are mounted maybe selected in accordance with the angle involved.

In Fig. 5 a fourth form of mypiling is shown. In this form the pile member I3 is generally similar to the .pile members 6 and il of Figs. 1 and 3 with the exception that a pair of spaced parallel interlocking elements 1 is provided wherever a single interlocking element 'l appears on the pile members 6 and Il. In the pile member Il for use in .forming a corner in a. wall the respective pairs of interlocking elements 'l are mounted in atacent faces of the pile member I4 instead of in opposite faces as in' the structures ofFigs. l and 3.

Anyor all of the above described ,forms of my piling may be made with bevels at their lower ends in the manner of the bevels 6b of Fig. 2 and may, of course, be provided with reinforcing rods R embedded therein at the time the pile units are-cast.

The anchoring means of the interlocking elements 1 may beprovided in various forms. A longitudinally extending flange projecting rearwardly froml the rear side of an interlocking element l may be split at longitudinally spaced points to form a plurality of rearwardly projecting anchoring ilngers 1a which are then alternately bent to one side and the other and appear as shown in Fig. 6. The iingers 'la of Fig. 6 may, if desired, be twisted about their lrespective longitudinal axes through a small angle to produce the construction shown in Figs. 7 and 8. Also, as shown in Fig. 9, a. ii'ange 1b projecting rearwardly of and extending longitudinally of an interlocking element 1 may be welded, integrally joined or otherwise secured at its free edge to the longitudinal center line portion of a narrow, elongated rectangular anchoring plate 1c, preferably in right angled relation thereto as shown.

It is to be noted that the faces of a wall built of either of the forms of my concrete pile shown in Figs. 1 and 5 are entirely of concrete, the interlocking elements 1 thereof being housed in the recesses or grooves of the pile units and hence being concealed. The recesses or grooves may, of course, be lled with concrete, grout or mortar 4if desired.

My piling construction enables use of pre-cast concrete piles to build walls having strength equalling the strength of walls which are cast in place and yet having the advantage of being adapted for driving in water as in coiierdam construction. Because of the close abutment of adjacent piles in addition to the seal afforded by the interlocking elements l, walls built of my pile units are highly resistant to leakage of water therethrough.

, It is apparent that I have invented a novel and improved type of precast concrete piling Well adapted for permanent or temporary construction oi cofferdams, Walls, dams, bridge piers and abutments, culvert walls and abutments, founda-y tions and other structures. Y

l It will, of course, be understood that various changes may be made in the form, details, arrangement and proportions of the parts, Without departing from the scope of my invention, which, generally stated, consists in a device capable of carrying out the objects above set forth and in Vthe novel parts and combinations of parts disclosed and dened in the appended claims.

What is claimed is:-

l. Concrete piling comprising a plurality of elongated concrete pile members of polygonal cross-sectional shape, a pair of interlocking elements for each of said members, each of said interlocking elements having aseries of anchoring prongsprojecting from the inner side thereof, some of said prongs being bent to one side and some to the other side at different levels, said interlocking elements being associated with respective faces of said member and extending longitudinally thereof, the anchoring prongs of said interlocking elements being embedded in said member, one interlocking element ofv one member being engageable with an interlocking element of a second member to lock said members together in parallel relation.

2. Concrete piling comprising a plurality of elongated concrete pile members of polygonal cross-sectional shape, a pair of interlocking elemerits for each of said members, each of said interlocking elements having a series of at anchoring prongs projecting from the inner side thereof, some of said prongs being bent to one side and some to theother side at different levels, said interlocking elements being associated with respective faces of said member and extending longitudinally thereof, the anchoring prongs of said interlocking elements being embedded in saidv member, one interlocking element of one member being engageable with an interlocking element of a second member to lock said members together in parallel relation and said flat prongs being twisted relative to the vertical.

EDWIN FENTON STEVENS. 

